The “Nuclear Option” Donald is asking for here is actually very reasonable. He simply wants the U.S. Senate to adopt the same rules for passing legislation that almost every national legislature on Earth uses.
The “Nuclear Option” threatens neither democracy nor the constitution. It would simply put the Senate on the same operating rules as the U.S. House of Representatives and foreign bodies like the British, Canadian, Australian, and Indian parliaments. Senators would actually be able to get something done and implement long-term solutions.